Routing machine



ROUTING MACHINE Filed OCt.- 4, 1953 I l I I v I I l i I l I I l lIIIIIIII/III/IIIIII/IIIII/I/l //vv/v r0 5 A Aws 191551971 Patented Feb.5, 1935 v f a, :11" H I UNITED T TES PATENT: omee Y 1 ROUTING MACHINEHans 1 Albertz, Bad-Godesberg, Germany Applicationio'ctober 4, 1933,Serial No. 692,072;

' lhGermany October '6, 1932 I Y 7 Clainis. (Cl. IM-87) My inventionrelates to'routing or cutting ma- (distance also between the shaft (1and theinext chines and, more particularlyhto the typefprofollowingshaft 0. h

vided with a plurality of cutters mounted on par- Each shaft c bears,(man extension reaching allel shafts so as to cut a plurality of groovesbeyond the upper crossbar, a cutter or routing 5 or the likesimultaneously. tool c all these cutters forminga single row.

It is an object of my invention'to provide a Further, each Shaft c is,provided with a pulley machine of the type mentioned, which is capablep; but alternate pulleys. are mounted at a higher of cutting a greatvariety of grooves, mortices, and'at a lowerlevel respectively, so: thatthe pultenons or the like, either dove-tailed or plain. leys 17 13 71, 3of the first, third, fifthfsev- 0 Another j ct O y v n n is facilienthandninth shafts form one row, while the 19 tate the adjustment of themachine for the, cutpulleys, 112,174,116, pa of the second, fourth,sixth s f a pl r li y f r ve f y sir d disand eighth shafts, formanother row. The axes tame from each re. "of all the, shafts c and,preferably, also the axis Still other Objects of inVentiQn W111v pp ofthe shaft d are disposed within the sameplane. 5 w in t following s p ee In addition thereto there are rotatably mount- In h accompanyingdrawing Y I ed in the tool frame b a plurality of idlers 0, and Fi 1 i ai nal l vati n onv li 1- 1,. Fisan extension of the lower cross baroftheft'oo'l 2, of a machine according to my invention. frame b carriesan electric motor 11; provided with 2 is a hori fm a sec i n 011 e F s-1- a driving pulley Io. As will be noted from Figures 3 is a p a ViewOfthB m neii 1 and 2, the extension of the.lower cross bar ljage holdingthe Work. having been Q dreaches through an'opening 9 provided in theig. 4 is a plan w O t e ag ,or,,w0 rk machine frame. a/so that' themotor i and. the i f I ,Q pulley 7c are located outside the machineframe F g. 5 shows a detall of the carriage on a larger a and,consequently, dfl cces ible, Fur- 25 scalethermore, the lower rim of theopening g forms The mafzhme eo s a n} 111910111119 a sort of flangeprovided with a series of pairs frame wlth lateral flanges Servmgassliding of holes h, in which bolts may be inserted for setracks orguides for the carriage or work holder curing the tool frame b atVarying vangles t r, slidably mounted thereon. Belowv this work respecttdthe machine'framem holder 1 there is secured to theffront-wall of theThe pulley k drives two Superimposed t machine frame a a horizontalgrate, 3 as shown The belt which is Shown hrFig; 2 m 3 P drawmg of infull lines,'passes first over the idler 01, then the space P e n theflanges over the pulley m which is the first of the series i g g i i f gp g at the higher level, then over a second idler 02 35 Ta 1 y 0 spaceontzon ars exten mg trans and so on alternately over all the pulleys p4;p6, versely and longitudinally of the frame, thelont th h 1 and theidlers o gitudinal bars extending at their inner endsbep8 8 1g 81; eve Ii 05, arrangedbeside them. Ultimately the belt yond the last transversebar thereby providing 1 I 1s deflected by the idler 0s and passes backto the unobstructed spaces bet een the longitudm'al pulley Ick- By this"arrangement of driven pulleys 40 bars. At some distance below the grate3a vra a i alternatlngwith idlers having materially larger tical shalt dis ournalled 1n bearings attached to diameters I Obtain angle of Contactbetween machine i and t i fQ the belt and each pulley which, as itexceeds a m 1n the dlrect'lon of s am by means Of 180", efficientlypreventsany sliding of the belt.

foot-step bearing 6 which may le Pr The lower belt n, which is shownin'Fig. 2 in 45 Bred by operating handle y 1 dotted linesypasses in ananalogous manner over H The shaift d Carries frame WhiQh I rm tool thefirst"idler 01, then over the first pulley pi, frame and which isrotatable about'the axis of appertaining t t lower d then alterthe shaftd to a certain extent. Irithe two horiat over t r O4, o5, and t 1.

'50 zontal cross bars of thistool frame aplurality of leys p ,1 d isultimately deflected by tool shaftsc arejournalledwith'their axes inthe. idler 0s and passes back to the driving paralleltoeach otheras'WelL a'stdthe' shaftd, n k, and with equal and invariable distancesbetween A11 t idirs, whigh have b n nfitt'd them. For'reasons which willbeeXpIaiIied 'furure "l'for freason shf clearn'ess of that drawing therbelow, I find it advisable to provide the same but-are distinctly shownin Fig.v 2 ;"are desi 1 to guide both of the superimposed belts n and m.

The last idler 06 may be'journalled either resiliently or adjustably sothatit functions as a belt tightener, and in such a case I may constructarranged in a single row. In view of these in, creased diameters Iobtain a far better efficiency and safety against sliding even at veryheavy loads. n Y The work holder 1 consists of a base having twolongitudinal side flanges in,-slidingengagement with the flanges z ofthe machineframe a. plurality of vertical walls are mounted on thisbase, comprising the wall 3 arranged at right angles-with the directionof movement, the wall j'l slightly inclined towardsone of the sidesofthe base the ,wallr8, inclined at the samean'gle of inclination towardsthe other side" of the base, and two (longitudinal "wallsjeach.o'f'jwhich is made up of three sections spaced apart as indicated at 4inFig. 4., The walls 7 and'8 and the middle sections of the longitudinalwalls are secured not to the base proper, but to a separate base 9,secured to the main base and laterally adjustable with respecttothelatter. I s I Each of the walls 5;, '7 and 8 is provided with adetachable angle-iron stop if and with a horizon I tal groove, inwhichaclamping finger u is sliding means. 7 5

the desired width-of the mortices;

ably mounted. This finger, which is more distinctly' shownin Fig. 5; isprovided with a plurality of detachable, suitably curved platespringsv.'

Joumalled in the-longitudinal side walls and adjustable both in axialand circumferential di* rection bymeans of handles and suitable lockingdevices (not shown) are three shafts w carrying eccentricallyarrangedJrollers y serving as clamp- In order to cut in a board, of mapile of super- I imposed boards, a plurality of straight mortices of anydesired length, width and'distance from each other I firstfix on theshafts c a set of cylindric'al cutter's'ciwith diameters correspondingto the board, or the pile .of boards, to the wall 8 of the work holderr;- The horizontal grate 3 serving as bottom stop and the angle iron tserving as side stops for the work are used as stops for two adjoiningedges of the board,- the clamping finger u moved laterallyuntilthefspringsv firmly press againstthe third'edge, and, ultiinately, theeccentric roller y is first "moved axially and then turned by meansofthe handle until it. also firmly presses against one side of the board.Theroller y is then looked, and the board o is now clamped in' theposition shown in In order to obtain the desired depth of the mortices,I raise or lower; the tool frame b by means of the handle 6, andT-byturning the tool frame about the shaft d and bysecuring it at a suitableangle with the direction of movement of the work I may'also obtainianydesired distance betweentwo adjacent mortices. This distance, it will benoted, is not equal to the actual and, as a fact invariable distance ofthe cutters ,cr fromeach other, but issmaller in proportion to the sine:of the angle-(of inclinationbetween Then I clamp After thesepreparatory adjustments are completed, I start the motor 1' and bypushing the work holder rto'wards the cutters 01 in the directionindicated by arrows in Figs. 3 and 4, I simultaneously obtain ninevmortices of the desired dimensions and at the desired distances fromeach,

In orderto produce mortices dove-tailed in the lengthwise, direction ofthe, board, I proceed in the same way, but I use conicalcutters insteadof the cylindrical ones.

In order to produce mortices dove-tailed in the directionof thethickness of the board, Ifirst, clamp the latter to the vertical wall '7of the work holder 1, and leading the work holder over cylindricalcuttersc1, I produce a set of mortices with parallel walls being at acertain acute angle in the opposite direction. 'I'he'total effectis aset of mortices dove-tailed inthe direction offthe thickness of theboard, as desired. The angle between the walls of these. mortices is thesame as that between the walls 7 and 8 of the work If Iwant to producein the edge of a large board a number of mortices, more than the ,numberof the cutters'ci, i e.,more thannine morticeswhen using the machinespecifically'illustrated in the drawing,' I remove -the clamping fingersu and the angle irons t, the latter being. temporarily replaced by boltsinserted in suitable holes provided in thewalls s,-7 or. 8, asthecase'maybe.

Apart fromthis, the clamping of theboard, and

the cutting of the firstset of morti ces..do-not differ, fromtheprocedurel described above.

Beforefl'cutting the next set 'of-morticesI at tach to the-upper endofthe shaft (1 a cap 5 having exactly'thesame dimensions as the cuttersc1. Inserting thisjcap inthei lastof the. mortices produced in the first"butting step, I use it as, a stop to obtain betweenthe lastmortice ofthe first seriesand the firstone. of, thesecondseries exactlythe samedistance as between :two adjacent morticesof the same series. I

Ina similar manner, I maycut inthe sameedge of a long board. any desirednumber of mortices, all 'exactly'of the same dimensions andwithexactlyequafdistancesj between them. With the angle-irons t and the clampingfingers uremoved, boards of anylength' may readily be inserted in thespaces provided the slots 4 and clamped to any of the walls 8,? or'8 inany-required posi- I tion.

. I'From rig. 3 it will be noted that the bars-of the, grate 3 do notreach materially beyond the row ofthe cuttersc if this rowstand'satright angles with thesliding tracks z ,qand.the .less so if thetool-frame bearing these cutters iszin the .moreporjless inclinedworking position, indicated in dotted lines. In view thereof, thegrateA,

3, whichserves in the clamping procedure as r a stop for=the loweredge-"of the board, does not "interfere with the withdrawing of thecutting j In the abov e description. I have explained my inventionwitha, close reference to .7 the Sp cific example illustrated inthe drawing,butI wish it and improvements thereof, as will be obvious to thoseskilled in the art.

The feature which I consider as most important is the provision of atool frame provided with a plurality of cutters arranged to produce acorresponding number of separate grooves, mortices or the like, andcooperating with a reciprocating work holder, the angle between theplane of said tool frame and the direction of movement of the workholder being adjustable so as to influence the distance between twoadjacent mortices produced. In this connection it will be understood,that I may fulfill this purpose, though less conveniently, even with atool frame rigidly secured to a machine frame, but cooperating with awork holder which, apart from its reciprocating movement, also allowsfor the required adjustment of the angle between the direction of thismovement and the plane of the tool frame.

Instead of making the tool frame adjustable in a vertical direction soas to influence the depth of the mortices produced, I may also resort toa grate 3 adjustable in that direction.

I claim:

1. In a routing machine, a machine frame, a work holder slidably mountedon said machine frame, a tool frame carried by said machine frame, aplurality of cutters rotatably mounted in said tool frame in parallelrelation to each other and at fixed distances apart, the cutters beingarranged to simultaneously out a plurality of separate grooves in apiece of work, means for driving said cutters, and means for adjustingthe angle between the plane of said tool frame and the direction ofmovement of the work holder thereby to vary the distance between thegrooves.

2. In a routing machine, a machine frame, a work holder slidably mountedon said machine frame, a tool frame pivotally and adjustably connectedwith said machine frame, a plurality of cutters rotatably mounted insaid tool frame in parallel to each other and at fixed distances apart,the cutters being arranged to cut a plurality of separate grooves in apiece of work, andmeans for driving said cutters, said driving meansbeing also mounted on said tool frame.

3. In a routing machine, a machine frame, a work holder slidably mountedon said machine frame, a tool frame pivotally and adjustably connectedwith said machine frame, a plurality of shafts rotatably mounted in saidtool frame in parallel to each other and at fixed distances apart,pulleys secured to said shafts, cutters attached to said shafts, saidcutters being arranged to cut a plurality of separate grooves in a pieceof work, a driving motor mounted on said tool frame, two belts adaptedto be driven by said motor and adapted to drive one of two groups ofsaid pulleys, respectively, the pulleys of the one group alternatingwith those of the other group, and a set of idlers rotatably mounted insaid tool frame,

the idlers being designed and arranged to deflect and guide each of saidbelts so that the angle of contact between each of the pulleys and thebelts exceeds 180.

4. In a routing machine, a machine frame, a work holder slidably mountedon said machine frame, a tool 'frame pivotally connected with saidmachine frame and adjustable both axially and angularly, a plurality ofcutters rotatably mounted in said tool frame in parallel to each otherand at fixed distances apart, the cutters being arranged to cut aplurality of separate grooves in a piece of work, and means for drivingsaid cutters, said driving means being also mounted on said tool frame.

5. In a routing machine, a machine frame, a work holder slidably mountedon said machine frame, a horizontal grate arranged below said workholder and serving as a stop for the lower edge of the piece of work tobe secured to'said Y work holder, a tool frame, a shaft rotatably andadjustably connected with said machine frame and carrying said toolframe, a plurality of cutters rotatably mounted in said tool frame inparallel to each other and at fixed distances apart,

part of said walls so as to allow for the clamping of pieces of workmaterially wider than the width of the work holder, a tool framepivotally and adjustably connected with said machine frame, a pluralityof cutters rotatably mounted in said tool frame in parallel to eachother, the

cutters being arranged to cut a plurality of separate grooves in a pieceof work, and means for driving said cutters, said driving means beingalso mounted on said tool frame.

'7. In a routing machine, a machine frame, a work holder slidablymounted on the said machine frame, a tool frame connected with the saidmachine frame by a shaft, a plurality of rotatable, parallel cutterscarried by said tool.

frame, the cutters being arranged to simultaneously cut a plurality ofseparate grooves ina work-piece, means for driving the said cutters, andmeans for adjusting the angle between the plane of the said tool frameand the direction of movement of the Work holder, a cap attached to thetop of the shaft bearing the tool frame, the

said cap having the exact dimensions of the cutters, and all the cuttersas well as the. said cap being arranged in one single line with equaldistances to each other.

HANS ALBERTZ.

